reading prob from input, adding rel_pos and fixing call random_number in flag_particles , making far box dependent
reading prob from input, adding rel_pos and fixing call random_number in flag_particles , making far box dependent

pdebuyl-lab/RMPCDMD,pdebuyl/RMPCDMD,pdebuyl/RMPCDMD,laurensdeprez/RMPCDMD,laurensdeprez/RMPCDMD,pdebuyl-lab/RMPCDMD